Limiting circuit for a semiconductor transistor and method for limiting the voltage across a semiconductor transistor

A limiting circuit for at least one semiconductor transistor, the circuit comprising:

• a limiting path coupled between a first power terminal and a second power terminal of the semiconductor transistor and including a limiting transistor, wherein a node of the limiting path between the limiting transistor and the second power terminal of the semiconductor transistor is coupled to a control terminal of the semiconductor transistor;
• a voltage source, the voltage source comprising a boost converter which is designed to boost a supply voltage at an input terminal of the boost converter to the control voltage for the limiting transistor;
• wherein the voltage source is coupled to a control terminal of the limiting transistor, and
• wherein the voltage source is designed to supply a control voltage to the control terminal of the limiting transistor, the control voltage corresponding to a critical voltage for the voltage between the first power terminal and the second power terminal of the semiconductor transistor;
• and
• wherein the limiting transistor is switched to the conductive state when the critical voltage is exceeded at a power terminal of the limiting transistor.